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Thu Oct 09, 2008 8:55 pm  |
Does the multiple layers of SPF add up to be more?
To illustrate : Say if u were to apply a moisturiser with SPF 15 or moisturiser then a suncreen of 15 follows by a foundation or mineral make up of say SPF 15, what is my SPF coverage in the end? Is it still 15 or SPF 30(15 plus 15)?
Has anyone thought abt this? (I was doing research but nothing on this aspect) Thanks |
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Thu Oct 09, 2008 9:12 pm |
Hi Fairene,
Unfortunately, SPF factors do not stack up. (So, an SPF 15 + SPF 15 does not equal SPF 30) So, even if you apply two layers of SPF 15 sunscreen, you still only have an SPF of 15.
That said, there are benefits to using an SPF moisturizer plus sunscreen. Most people do not apply enough sunscreen product - which means that they're not getting the full benefit of the SPF factor. Two layers of SPF give you a higher chance of actually getting the full amount of SPF.
Also, in cases where one item is not broad spectrum - it could be beneficial to have an additional layer of protection. (Many items only have UVB - so it would be helpful to add an item that has both UVA and UVB protection.)
Hope this helps! |
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Thu Oct 09, 2008 10:21 pm |
| and people should don't mix them either like a physical type sunblock all over then cover with a chemicall type...it's proven to 'mess up' the chemical makeup of these products. |
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Thu Oct 09, 2008 11:43 pm |
have to find out more abt mixing chemical and Physical suncreen ... anyone knows any source on this?
Cause sometimes u use chemical sunscreen but foundation has SPF and is usually Mineral which means it is physical.
... and sometimes SPF has both chemical and physical too so ??? |
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Fri Oct 10, 2008 12:29 am |
hi, yes many physical sunblocks like I use have a chemical in them and it's ok...
they are mainly like 7% or higher in zinc and maybe titanium oxide too...I prefer high zinc but use diff ones...the chemical is not the main componant protecting you...it's the zinc or titanium oxide.
I like DHC, but on days I'm only driving and such, higher ones like Shiseido 55 lotion are my best choice for all summer...do not forget the neck/chest  and I use others too.
But some are better looking on skin ..it is trial and error. I found out I break out (react) to Neutogena's chemical sunscreen but sometimes can use it-i will only use the Helioplex as it is stable a bit longer in the sun then plain sunscreens.
More awesome detailed info I have found is at makeupalley dot com, sign in and go to the skin care board if I had not found that site and started asking and reading on there and trying all diff kinds of sun care products I would not look as young as I do for my age..I love them for the help given to me and others.
Tell them you are new in a post, they will link you to the suncare experts who have vital suncare info on the board, I even print out their info, it can be confusing but overlook the chemist type talk lol and simply ask what's the best etc., in a post you will find a good sunscreen soon and know more if you try this 
Sorry so choppy it's beddy byes for me-good day! |
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Fri Oct 10, 2008 6:23 am |
| Fairrene wrote: |
have to find out more abt mixing chemical and Physical suncreen ... anyone knows any source on this?
Cause sometimes u use chemical sunscreen but foundation has SPF and is usually Mineral which means it is physical.
... and sometimes SPF has both chemical and physical too so ??? |
Top dermatologist Dr Leslie Baumann recommends a double layer of sunscreen, first a chemical sunscreen, and then a physical sunscreen on top, when spending many hours outdoors.
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4. If I am going to spend any significant time in the sun, though, a moisturizer with SPF is not enough. I add a chemical sunscreen like La Roche-Posay Anthelios SPF15 (if I'm lucky, I might even have some of the SPF50+ version that's only available abroad), followed by Blue Lizard Australian Suncream for sensitive skin. (The Blue Lizard is a physical sunscreen - that is, it contains zinc oxide and titanium oxide to reflect light - and may appear white for the first few minutes after it's applied). Using both a chemical and a physical sunscreen might seem like overkill, but it's absolutely the best way to protect skin in sunny environments.
http://health.yahoo.com/experts/skintype/11397/a-daily-skin-care-routine/
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Female, 40, Norway. Normal/dry skin, starting to see signs of aging. Staples: Glycolic acid cleanser, SkinCeuticals Phloretin CF, Revaleskin, NIA24. |
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Fri Oct 10, 2008 7:06 am |
I've never thought about this question, but it is good to know... Thanks.  |
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Mon Oct 13, 2008 10:11 pm |
| Quote: |
| Top dermatologist Dr Leslie Baumann recommends a double layer of sunscreen, first a chemical sunscreen, and then a physical sunscreen on top, when spending many hours outdoors. |
Septembergirl
to your post about layering, I had heard this was not good..but if this top derm says otherwise it may be tested and true.
Maybe it is only for long hours - I had read it is not a good idea but where I read it not many like myself get sun.
I won't layer - it's way to many steps under the other things on my skin LOL
TY for this as it may help someone who is heading to the beach etc.! |
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Tue Oct 14, 2008 3:31 pm |
Of course they don't  |
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47, former sunworshipper, skincare addict, oily T-zone, fair skinned, love Vita A, some hyperpigmentation, microneedler. |
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